Coloring of different index/numbered points

Question

Rubel Ahmed 2021-2-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/735527-coloring-of-different-index-numbered-points

评论： Rubel Ahmed 2021-2-4

Hi all,

I have several points say 100 points. Each points have unique index/number from 1 to 100. I want to see 1 to 20 index point as blue color, 21-40 index point is red, 41-60 is green,61-80 is yellow ,and 81-100 is purple. How can I do this? Thanks in advance.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2021-2-4

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/735527-coloring-of-different-index-numbered-points#answer_614137

在 MATLAB Online 中打开

try this:

markerSize = 50;
x = rand(100, 1);
y = rand(100, 1);
plot(x(1:20), y(1:20), 'b.', 'MarkerSize', markerSize);
hold on;
plot(x(21:40), y(21:40), 'r.', 'MarkerSize', markerSize);
plot(x(41:60), y(41:60), 'g.', 'MarkerSize', markerSize);
plot(x(61:80), y(61:80), 'y.', 'MarkerSize', markerSize);
purple = [0.6, 0, 0.6];
plot(x(81:100), y(81:100), '.', 'Color', purple, 'MarkerSize', markerSize);
grid on;

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Rubel Ahmed 2021-2-4

Thanks@Image Analyst

请先登录，再进行评论。

Answer 2

Peter Bonavita 2021-2-4

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/735527-coloring-of-different-index-numbered-points#answer_614142

在 MATLAB Online 中打开

You can use hold on to plot multiple sets of points on the same figure, and customize the plot of each set.

Here's an example. Check out the linespec section of the plot documentation for more info about changing the color!

x = rand(100,1);
figure; hold on; % hold on lets me plot multiple sets of points on same figure
plot((1:20),x(1:20),'bo'); %blue, circle
plot((21:40),x(21:40),'ro'); %red circle
plot((41:60),x(41:60),'go') %green circle
plot((61:80),x(61:80),'yo') %yellow circle
plot((81:100),x(81:100),'mo'); %magenta circle